ATSAM3S4CA-AUR

Overview

The ATSAM3S4CA-AUR is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 64MHz. It features 256KB of in-system programmable flash memory and 48KB of SRAM. The device includes an internal oscillator and supports a supply voltage range of 1.62V to 3.6V. Connectivity options include EBI/EMI, I2C, MMC, SPI, SSC, UART/USART, and USB interfaces. It provides 79 general-purpose I/Os and integrates peripherals such as DMA, PWM, and watchdog timers. Data conversion capabilities consist of fifteen 10/12-bit ADC channels and two 12-bit DAC channels. The component is housed in a 100-LQFP package with an industrial temperature range of -40°C to 85°C.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit execution
• Supports multiple communication protocols including USB, SPI, and I2C
• Includes direct memory access controller for high-speed data transfer
• Features integrated analog-to-digital and digital-to-analog converters

Applications

• Industrial control systems requiring robust connectivity
• Consumer electronics utilizing USB interface capabilities
• Data acquisition applications leveraging ADC/DAC functionality
• Embedded systems needing DMA-supported processing

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with existing design constraints regarding the 100-LQFP footprint and power supply requirements. Confirm that the selected variant matches the required flash and RAM capacities for the target application.

Selection Notes

Select this component when a balance of moderate program storage and extensive I/O count is required within a compact surface-mount package. Consider the availability of hardware peripherals like USB and EBI if external memory or host connectivity is necessary. Evaluate the 64MHz clock speed against processing demands to ensure adequate performance margins.

Part Context

This part belongs to the SAM3S series of microcontrollers from Microchip Technology. The series utilizes the ARM Cortex-M3 architecture, targeting cost-sensitive embedded applications. The ATSAM3S4CA-AUR represents a specific configuration within this family, distinguished by its 256KB flash capacity and 100-pin LQFP packaging suitable for complex peripheral integration.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the SAM3S family. Verify functional equivalence regarding memory size and peripheral availability before replacing.